Adsorption of mercury(II) from aqueous solution using dried Scrophularia striata stems: adsorption and kinetic studies

Dehghani, Mansooreh; Nozari, Majid; Golkari, Iman; Rostami, Nasrin; Shiri, Marziyeh Ansari

doi:10.5004/dwt.2020.26232

Cited by 13 publications

(1 citation statement)

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“…The appearance of Fe 0 and FeS indicated that SnZVI was successfully synthesized and loaded on BC, which was consistent with the results of SEM. However, the peak of FeS was weak, probably because of the low content and poor crystallinity of FeS [ 34 ]. In addition, an Fe 2 O 3 (JCPDS No.…”

Section: Resultsmentioning

confidence: 99%

Co-Removal Effect and Mechanism of Cr(VI) and Cd(II) by Biochar-Supported Sulfide-Modified Nanoscale Zero-Valent Iron in a Binary System

Zhao

Cao

et al. 2022

Molecules

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This study aimed to explore the co-removal effect and mechanism of Cr(VI) and Cd(II) with an optimized synthetic material. The toxicity and accumulation characteristics of Cr(VI) and Cd(II) encountered in wastewater treatment areas present significant challenges. In this work, a rational assembly of sulfide-modified nanoscale zero-valent iron (SnZVI) was introduced into a biochar (BC), and a Cr(VI)–Cd(II) binary system adsorbent with high efficiency was synthesized. When the preparation temperature of the BC was 600 °C, the molar ratio of S/Fe was 0.3, the mass ratio of BC/SnZVI was 1, and the best adsorption capacities of BC-SnZVI for Cr(VI) and Cd(II) in the binary system were 58.87 mg/g and 32.55 mg/g, respectively. In addition, the adsorption mechanism of BC-SnZVI on the Cr(VI)-Cd(II) binary system was revealed in depth by co-removal experiments, indicating that the coexistence of Cd(II) could promote the removal of Cr(VI) by 9.20%, while the coexistence of Cr(VI) could inhibit the removal of Cd(II) by 43.47%. This work provides a new pathway for the adsorption of Cr(VI) and Cd(II) in binary systems, suggesting that BC-SnZVI shows great potential for the co-removal of Cr(VI) and Cd(II) in wastewater.

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Section: Resultsmentioning

confidence: 99%